Thanks, this is a good start. But I'm still confused. The only 20-button chart shown, the one from La Concertina, only has a few chords and is missing major chords like the A and E chords. Then there are the 30 button charts, but how do you translate them to a 20 button, or is it possible at all?
Another question-are there right hand chords, or are chords always played with the left?
sorry for all the questions, I'm just trying to get the hang of this...